The Pokémon Company released the
Pokémon Coquelicot (ポケモン ポピー) LINE set on May 18th, 2023 for 370 yen (including tax) or 150 LINE Coins. Coquelicots adorn this lovely Pokémon theme. Now you can choose from mimosas, baby blue eyes, or coquelicots to make your app bloom.
Sources:
https://store.line.me/themeshop/product/adaab538-6ddc-49a7-90a5-648bb26505d7/en and
https://www.pokemon.co.jp/goods/2023/05/230519_ph01.html